Feeling Stupid

my advisor makes me feel so stupid sometimes, it's infuriating. I was asking him some questions about ordering microorganisms from Europe; I've never really ordered lab stuff before. This is part of our conversation:

Dr. French: You know how to order clothes online, right?

me: Uh, yeah.

Dr. French: Well, it's the same as ordering bacteria.

me: I dont normally order clothes from Germany...

Dr. French: Well you should. Germany or France or Japan... you know they all have computers. They know what Visa and Mastercard are.

me: uh, yeah. thanks.